Description

Since Unreal Engine 5.5 stationary lights have stopped working with GPU Lightmass when using Cascaded Shadow Maps.

With Virtual Shadow Maps enabled on the project, GPU Lightmass works. This issue does not happen with CPU Lightmass or in 5.4.

Steps to Reproduce
  • open a blank project, add a floor, a cube and a stationary spotlight positioned above the cube pointing down
  • enable the GPU Lightmass plugin
  • in the project settings, set the shadow method to Shadow Maps
  • build the lighting with GPU lightmass: the stationary spotlight stops casting direct light after the bake finishes

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Backlogged
ComponentUE - Graphics Features
Affects Versions5.55.6
CreatedMay 29, 2025
UpdatedJun 6, 2025
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